Window-latch device



R. BORDEN WINDOW LATCH DEVICE Jan. 22, 1929.

4 H .7 w m .r a.- 8 En? Filed Feb. 15. 1926 Patented Jan. 22, 1%;9.

stares PATENT OFFICE.

RAYMOND BURDEN, OF XENIA, OHIO, ASSIGNOR F ONE-HALF TO CHARLES H. TATE, OF RICHMOND, INDIANA. i i i WINDOW-LATCH DEVICE.

Application filed February 15, 1926. Serial No. 88,284.

the accompanying drawings, in which-Fig ure 1 shows a portion of a window, with the sash partly open, showing the operating mechanism asin the position it assumes when the window sash is down. Figure 2 shows the sash in closed positiomwith the operating mechanism as in the position when the sash closed. Figure 3 shows the operating mechanism at right-angles to that of Fig. 3, but with the operating mechanism in the position it assumes when the sash is closed. Figure 4 shows the operating mechanism in f the position it assumes when the sash is partly open as in Fig. 1. Figure 5 is a detail, showin the upper edge of one corner of the sash.

Figure 6 is a detail plan view or the Y-shaped dog alone. Figure 7 is a plan view of the plate which carries the operating mechanism. And Figure 8 is an elevation of the armature alone.

Similar indices denote like parts throughout the several views.

In order that the construction, the operation, and the several advantages of my invention may be more fully understood and appreciated I will now take up a detailed description thereof in which I will setforth the same as fully as I may.

Referring now to the drawings in detail: 1 have shown a portion of: a window frame, including the usual jamb 1 between which the sash 2 is suspended whereby it may move freely up and down. Numeral 3 denotes one of the two counterpoise weights. Numeral 1 denotes the sash cord, one end of which is attached to the weight 3, from which it extends up over the pulley 5, then downward into the groove 6 where it is secured to the sash 2.

In this instance the counterpoise weights 3 should be of such weight that when the sash 2 is released it will be moved upward or to closed position, by said weights.

An oblong aperture 7 is formed through the jamb 1, extending longitudinally thereof, and of slightly less width than is the thickness of the sash 2.

Numeral 8 denotes a plate which is adapted to cover the aperture 7 and it is let in flush with the inner face of the jamb 1, to which it is secured by screws 9 which are inserted through apertures formed through the end portions of said plate 8.

Numeral 1O denotes a magnet coil, having a core 11 which projects down below its lower end. The magnet is rigidly secured to the inner side of the plate 8 by the bracket 12, and by which it is suspended, this arrange ment of course places the magnet inside the aperture 7 where it will not be in the way of the sash on one side or of the weight 3 on the other side.

Numeral 13 denotes the armature, which is located directly under the core 11, with which it is adapted to contact, being pivoted at one end on the pivot 14 which extends through the aperture 15, with said pivot carried by the plate 8. The lower-edge of the armature 13 is cut away at its free end portion, thereby forming a shoulder 16, as indicated in Fig. 8. Two incisions are made near together in the right-hand edge of the plate 8, and the material therebetween is then bent inward at right-angles thereto, thereby forming the stop 17 on which the free end of the armature may rest, and by which the armature is spaced properly from the core 11, where it may be attracted thereby when. the coil is magnetized. a y g The batteries A and B represent the source of electric current, said batteries being connected in series with the wires 18 and 19 leading therefrom. The wire 19 leads to one pole of the coil 10, while the wire 18 leads toone pole of the switch 20. Leading from the other pole of the switch to the other pole of the coil is the wire 21, as shown in Fig. 4. From the above it will be apparent that the coil 10 may be magnetized by pressing the button 22 of the switch, which will connect the wires 18 and 21, and thereby complete an electric circuit between the batteries and the coil. The electric current passing through the coil 10 will cause the armature 13 to be attracted to the core 11, and when the current is interrupted by releasing the button 22 then the armature will drop by gravity onto the stop 17, where it will remain until the coil is again magnetized, or until lifted by other means.

Formed through the lower portionof the plate 8 is an oblong aperture 23, there being tongues 24 and 25 extending over the upper and the lower ends respectively of said aperture 23, for the purpose hereinafter set forth. Said tongues are integral withthe plate 8. Also integral with the plate 8 and extending outward at right angles from the sides of the aperture 23, are the ears 26 and 27 which carry the pivot 28 which extends therebetween.

Numeral 29 denotes a dog, which has prongs C and D extending .(tlivergently therefrom, integral therewith, as shown in Fig. .6. Said dog is mounted onthe pivot 28, the latter being fitted in the aperture 30 of the dog, whereby the prongs C and D are adapted to extend through the plate 8, that is through the aperture 23.

' Numeral 31 denotes a substantially V- sha ed trigger, which is rotatably mounted on he pivot 32 which is secured to the plate 8. The shorter end of the trigger 81 is pivoted to the upper end of the arm 33, while the other end of the trigger extends up to the armature 13 and is adapted to engage the shoulder 16, as shown in Fig. 4.

The lower ends of the arm 33 terminates in a ball, which operates in a socket-like slot formed in the outer end of the dog 29, where it is retained by the pin 34 which is disposed through aperture 35.

Numeral b6 denotes a plate which is secured in the bottom of the groove 6, and is therefore rigidly connected with the sash C.

Extending out at right angles from the plate 36 are two, spaced apart, fingers 87 and 38, which are adapted to engage the prongs Uand D of the dog 29.

Operation.

We will assume that the sash 2 is up to its limit, whereby the window is closed, and the various parts are in the positions as shown in Figs. 2 and 3. It then the sash be pulled down by hand, the parts will be brought to the positions shown in Figs. 1 and fl, at which time the window will be partly 0 en.

7 It is evident that in lowering tiesash the finger 38 will strike the prong D, thereby turningthe dog whereby the prong D will be forced downward and into contact with the tongue 25, while, atthe same time the prong C will be turned into the path of the prong 37, thereby preventing the sash from being Fm-theilowered. The turning of the prongs C and D will of course turn the dog 29 on its pivot 28, raising its outer end, and therefore raising the arm 33, which in turn will turn the trigger 31 on its pivot 32, which will turn the longer end of the trigger whereby it will lift the armature 13. Then when the sash is released it is evident that the gravity of the armature will cause the longer end of the trigger 31 to engage the shoulder 16. Also when the sash is released it will move slightly upward until the finger 38 engages the prong C, thereby preventing the sash from moving further upward as lon as the trigger is in contact with the shouldzir 16. It should now be noticed that the sash can not be either raised .or lowered by hand, except the dis tance between the fingers 37 and38.

Assuming that the switch is located at a distance from the window, and that the mechanism is connected up by wires with a source of electric current, it is evident that if the button 22 be pressed, to complete an electric circuit through the coil 10, that the core 11 will be magnetized, thereby attracting the armature 13 to the core 11, which will release the trigger 31, thereby causing the parts to instantly assume the position in which they are shown in Figs. 2 and 3, which will release the finger 38, thereby freein the sash C and permit it to move up to c osed position by the weights 3, that is to the position shown in Figs. 2 and 3. It is to be understood that the lower sash of a window may be operated in the same manner and with the same mechanism as that of the upper sash above described, however the raising of the lower sash will eventuate in opening the window insteadof closing it,

as with the upper sash. In fact both the upper and the lower sash may be equipped with one of the devices set forth and each operated by a separate button 22, or by the same button, whereby the top of the Window may be closed and the bottom opened at the same time, or at different times, as desired.

I desire that it be understood that various changes may be made in the several details herein set forth without departing from the spirit of the invention and. without sacrilicing auyot the advantages thereof which are new and useful.

Having now fully shown and described my invention, what I claim and desire to secure by Letters Patent of the United States, is'- In combination, a magnetic-coil, an armature pivoted at one end and located therebelow and normally retained, by gravity, out of contact with the magnet and having a shoulder formed in its lower edge, a dog located below said armature and pivoted at one end in horizontal position, a pair of end pivoted to said arm, and a stop to limit the downward gravitational movement of the armature, all substantially as shown and described.

In testimony whereof I have hereunto subscribed my name.

RAYMOND BURDEN. 

